Stockholders' Equity - Additional Information (Detail) (USD $)	3 Months Ended			0 Months Ended
	Jul. 25, 2014	Jul. 26, 2013	Jul. 25, 2014 Open Market Repurchase	Aug. 13, 2014 Subsequent Event Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to equity awards	$ 507,800,000
Unrecognized compensation expense will be amortized on a straight-line basis over a weighted-average remaining period, in years	2 years 8 months 12 days
Stock repurchase program, authorized amount	7,100,000,000
Allocation of purchase price of share repurchases	$ 118,900,000		$ 118,900,000
Cash dividend per share of common stock	$ 0.165	$ 0.150		$ 0.165
Cash dividend payable date				Oct. 22, 2014
Cash dividend record date				Oct. 10, 2014